Is it warm enough for cold-weather golf?

It is a midlayer, so it adds warmth without bulk for cool mornings and shoulder seasons. For freezing rounds you would want a base layer under it or a heavier outer layer over it.

Does it actually keep light rain off?

UA Storm repels dew and light rain while staying breathable. It is not a waterproof shell, so steady rain will soak through.

How does the fit run?

Under Armour describes it as a loose fit, so it sits roomy through the body. Golfers who prefer a trimmer look may want to size down.

What is the tee holder for?

It is a small built-in holder on the wearer's right side for carrying a tee during a round.

Follow the care label; the water-repellent finish lasts longer with regular washing and no fabric softener. Avoid high heat, which can degrade the treatment.

How does it compare with a standard quarter-zip?

It adds water repellency, four-way stretch and odor control that plain knit quarter-zips lack, plus the tee holder. The trade-off is a roomier cut and less warmth than a fleece-lined layer.